Camera's like the Moravian Instruments G2 series and the QSI cameras have the filter wheel very close to the CCD and you can use 1.25" filters. Other cameras need a filter wheel and depending on the scope, you may need 2 inch filters or 'could' get away with 1.25 inch filters....
Quote:
Originally Posted by rogerg
Is interesting looking at all these different variations of the same thing. I wonder why QSI had internal 1.25" filter wheel but SBIG says you need bigger than 1.25" ? Is that just because the SBIG filters are further from the chip? Or does the QSI have some vignetting?  |